Assembly Devices

Block out time to build with the LEGO® Assembly device to create configurations where players can build and disassemble props in your LEGO Islands with the press of a single button! Set up the interaction radius on this device to turn prop pieces it covers into holograms for players to assemble.

Through Verse, you can even set up props for players to disassemble. Design a world where players will never have to worry about stepping on Lego bricks as they watch their builds neatly fall into place. Enjoy the bricks raining down!

With the Assembly device, you can even hide props and dynamically turn off their collision to create progression-based building mechanics.

Fully engulf players in your buildable simulations by configuring audio and visual effects to signify a completed build. You can even use cinematic cutscenes in your interactions.

Use this device to create tycoon-styled gameplays where players can collect currencies and unlock quests by assembling props. You can also customize settings to create events that trigger after successfully completing a build. Test out this device in the LEGO Home Builder template as you combine both LEGO and Fortnite assets to create new environments.

Device Access

The Assembly device is available in LEGO Islands for Fortnite Creative and Unreal Editor for Fortnite (UEFN). 

You can find the device in the following locations:

• Creative: Creative Menu > Content > LEGO® Content > Devices > Assembly Device

• UEFN: Content Drawer > LEGO® Content > Devices > Assembly Device

To learn the fundamentals of how to access, place, and adjust settings for a device, see Using Devices.

Contextual Filtering

Some devices are affected by a feature called contextual filtering. This feature hides or displays options depending on the values selected for certain related options. This reduces clutter in the Customize panel and makes options easier to manage and navigate. To help identify them, values that trigger contextual filtering are in italic.

All options are listed, including those affected by contextual filtering. If an option is hidden or displayed based on a specific value, there will be a note about it in the Description field for that option in the table below.

Device Options

You can configure this device with the following options.

Direct Event Binding

The following are the direct event binding options for this device.

Functions

A function listens for an event on a device then performs an action.

To create or edit a function, follow these steps:

1. Open the device settings, and click a function option.

2. Click ADD, then click Select Device to access and select from the Device dropdown menu.

3. Click Select Event to bind the device to an event that triggers the function for the device.

4. If more than one device or event triggers a function, click the Add button to add a line and repeat these steps.

Events

An event tells another device when to perform a function.

To create or edit an event, follow these steps:

1. Open the device settings, and click an event option.

2. Click Add, then Select Device to access and select from the Device dropdown menu.

3. Click Select Function to bind this event to a function for that device.

4. If more than one function is triggered by the event, click Add to add a line and repeat these steps.

Using LEGO Assembly Device In Verse

You can use the code below to control a LEGO Assembly device in Verse. This code uses features of the Assembly device API to hide, assemble, and disassemble props. You can modify it to fit the needs of your experience.

using { /Fortnite.com/Devices }
using { /Verse.org/Simulation }
using { /UnrealEngine.com/Temporary/Diagnostics }

# See https://dev.epicgames.com/documentation/en-us/uefn/create-your-own-device-in-verse for how to create a verse device.

# A Verse-authored creative device that can be placed in a level

HideThenBuild := class(creative_device):

To use this code in your LEGO Island, follow these steps:

1. In UEFN, drag an Assembly device onto your island.

2. Create a new Verse device named assembly_example_device. To learn how to create a new device in Verse, see Create Your Own Device Using Verse.

3. Open Verse Explorer, and double-click assembly_example_device.verse to open the script in Visual Studio Code.

4. Paste in the code above, compile, and drag the device onto your island.

5. In the Content Drawer, search and add the Button device to your island twice.

   1. Name one button "Assemble" and the other "Disassemble".

6. Select your Verse device in the Outliner.

7. In the device's Details panel, assign the object references for Hide Then Build to the Assembly device, buttons, and props on your island. You can use the eyedropper to pick the device in the viewport, or use the dropdown and search for the device.

8. Save your project, and click Launch Session.